Thanks guys.
Darcy, I use gas at home although I have coal too. I sometimes will use it for certain things. The more I use coal and get used to the type of heat, the more I like it.
Barry, I usually hot punch but I actually drilled a small hole and drifted it this time. It is just an opening that I can file to size later.
This spring steel dates from the late 1800's I think. No way to be sure but it is early from our perspective. I was interested in seeing, if possible, any visible characteristics of the steel due to it's being early in steel's manufacturing. It does show a visible pattern in the material and the hardening line has some "banding" along it.
Notice the "feathering" out in front of the banding along the hardening line. In my opinion, this would indicate a less refined means of making steel. In other words, I don't think it is homogenous but is carbonized by forging. That said, it is testing to be consistently hard throughput the edge with no soft spots at all.